Invalidate transitive static-build dependents after source changes
Updating a shared module rebuilds it but leaves dependent pages stale. Traverse reverse dependency edges.
- Focused work estimate
- 3h + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Dependency graphs · Incremental builds
Estimated field mix
- Compiler and language tooling50%
- Developer tooling30%
- Performance engineering20%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
Fictional static documentation compiler Rowan transforms synthetic text modules through a deterministic local adapter. It never executes candidate source as code.
Setup prerequisites
- Create a synthetic module graph and deterministic transform stub.
- Provide file-change, missing-input and interrupted-output fixtures.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
Acceptance criteria
- Direct and transitive dependents rebuild
- Unrelated modules remain reusable
- Removed edges stop unnecessary invalidation
Implementation constraints
- Use previous and current graph where edge removal matters.
Verification to include
- Change shared leaf
- Remove dependency then change old leaf
Deliverables
- Invalidation planner and graph cases
Rollout and recovery
Rebuild all fixture modules if invalidation is uncertain.
Value of the work
For the engineer: Practice dependency graphs and cache correctness.
For the team: Inspect whether build speed improvements preserve output correctness.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.